Grok 4.1 Fast API
x-ai/grok-4.1-fast
Call Grok 4.1 Fast through UberLLM’s OpenAI-compatible API — routed automatically to the cheapest healthy seller. xAI · 1,000,000 token context. Fee included.
How to use Grok 4.1 Fast with the OpenAI SDK
Already using the OpenAI SDK? Change one line — the base URL — and call Grok 4.1 Fast with your existing code. Anthropic SDKs work against https://api.uberllm.dev/v1/messages.
from openai import OpenAI
client = OpenAI(
base_url="https://api.uberllm.dev/v1",
api_key="ull_your_key_here",
)
resp = client.chat.completions.create(
model="x-ai/grok-4.1-fast",
messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)Grok 4.1 Fast API — FAQ
How much does the Grok 4.1 Fast API cost?
Grok 4.1 Fast is on the live market, but no seller is serving it through UberLLM right now.
How do I call Grok 4.1 Fast via API?
Use any OpenAI-compatible SDK: set the base URL to https://api.uberllm.dev/v1, your UberLLM API key, and model "x-ai/grok-4.1-fast". Anthropic SDKs work via https://api.uberllm.dev/v1/messages.
Is Grok 4.1 Fast OpenAI-compatible on UberLLM?
Yes. Every model on UberLLM — including Grok 4.1 Fast — is served through one OpenAI-compatible endpoint, so you change only the base URL and key.